JP3074044B2 - Fire extinguisher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguisher for extinguishing a fire by discharging a fire extinguishing agent such as water, foam, powder or the like using a monitor nozzle.
The present invention relates to a fire extinguisher for extinguishing a fire in a large space such as an exhibition hall, a factory or a hangar.

[0002]

2. Description of the Related Art A monitor nozzle (also referred to as a fire extinguisher, a fire extinguisher, a water cannon, etc.) is used as a fire extinguisher in a large space, and a fire extinguishing agent such as water, foam, or powder is discharged from the monitor nozzle. Fire extinguishing systems that extinguish and extinguish are used.

In such a conventional fire extinguishing device, the monitor nozzle radiates the fire extinguishing agent in a rod-like state, so that the range that can be protected by one monitor nozzle is small, and the fire extinguishing agent is aimed at a fire point, that is, a fire extinguishing point. It was necessary to accurately determine and radiate, and it was difficult to cope with the spread of fire and the suppression of fire spread.

For this reason, a fire extinguisher has been proposed in which a fire extinguishing agent such as water, foam, powder or the like is radiated while turning a monitor nozzle to spray the fire extinguishing agent over a wide fire extinguishing section.

[0005] In such a fire extinguisher, a fire extinguishing agent can be sprayed over a wide range.
Due to the nature of the monitor nozzle, the width is fan-shaped or circular,
In other words, the width is the band width of the reach of the fire extinguishing agent radiated from the monitor nozzle. For this reason, it cannot be spread over a wide fan-shaped portion or almost the entire region from the installation position of the monitor nozzle to the maximum reach of the monitor nozzle.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a fire extinguisher capable of discharging a fire extinguishing agent over substantially the entire area of a fan or circle from the installation location of the monitor nozzle to the maximum reach of the fire extinguishing agent. Is to provide.

According to the present invention, there is provided a fire extinguisher in which a monitor nozzle is reciprocated or continuously rotated by a revolving mechanism to spray a fire extinguishing agent on a fire extinguishing section. There is provided a fire extinguisher characterized by comprising a turning speed changing means for changing the turning speed of the monitor nozzle during the operation. In this case, the turning speed changing unit is a unit that controls electric power given to the electric motor when the turning mechanism is an electric motor, and when the turning mechanism is a hydraulic motor, It may be means for controlling the flow of the hydraulic flow applied to the hydraulic motor.

[0008]

[Function] During the turning of the monitor nozzle by the turning mechanism,
The turning speed of the monitor nozzle is changed by turning speed changing means interlocked with the turning mechanism, thereby changing the reach of the fire extinguishing agent. When the turning speed is low, the fire extinguishing agent can be sprayed in a band-like area far from the monitor nozzle, and when the turning speed is high, the fire extinguishing agent can be sprayed near the monitor nozzle, whereby the monitor nozzle is centered. A fire extinguishing agent can be sprayed on a large fan-shaped or circular fire extinguishing section. In addition, since the turning speed of the monitor nozzle is increased when spraying the fire extinguisher near the fire extinguishing agent, it is possible to spray the fire extinguisher over almost the entire area of the fire extinguishing compartment in a short time.

The following table shows the results of an experiment for examining the relationship between the reach of the fire extinguishing agent (water) when the water is discharged from the monitor nozzle as the fire extinguishing agent and the turning speed of the monitor nozzle.

[0010]

[Table 1]

Note that the above-mentioned reaching distance changes if the water discharge pressure of the monitor nozzle (that is, the water supply pressure) is changed. From the experimental results, it can be seen that if the turning speed is changed, the reach of the fire extinguishing agent changes, so that the fire extinguishing agent can be evenly distributed to the fire extinguishing section by appropriately changing and adjusting the turning speed.

[0012]

An embodiment of the present invention will be described below.

In the present invention, for example, a fire extinguishing section in a large space is divided into several districts, and a corresponding monitor nozzle discharges a fire extinguishing agent to perform a fire extinguishing activity in a district where a fire has occurred. Shows only the first district Z among the fire extinguishing sections of a large space to which the present invention is applied, and four monitor nozzles (also referred to as a water cannon or a water cannon, a fire extinguishing gun) G1 to G4
Is arranged. When a fire occurs in the first area Z, the monitor nozzles G1 to G4 spray water, foam, powder, and other fire extinguisher while swinging right and left by a hydraulic motor (or an electric motor) in a semicircular shape. To extinguish the first area Z. In this case, as shown in FIG. 1, in the present embodiment, each of the monitor nozzles G1 to G4 has two stages of an inner circle area from the center of each semicircle to a dotted line and an outer circle area from a dotted line to a solid line. Spraying is performed while the switching is controlled.

The water cannons G1 to G4 used herein are, for example, Japanese Utility Model Application No. Hei 3-22011 filed on Apr. 5, 1991 under the name of "water discharge gun fire extinguisher" and the same name in 1991. Japanese Utility Model Application 3-2 filed on April 23
No. 8113, or another type of monitor nozzle having a swivel function.
FIG. 2 schematically shows such a monitor nozzle that can be used in the present invention. In FIG. 2, the nozzle mounting portion 10 is for mounting a nozzle such as a variable spray nozzle (not shown), The elevating shaft support portion 12 is rotatably supported on the water discharge conduit 24 of the water discharge gun rotating portion 14 so as to be vertically rotatable. Elevating expansion / contraction means 18 is provided on the water cannon rotating part 14.
The one end of the raising / lowering expansion / contraction means 18 is connected to the nozzle mounting portion 10 via a link 18a via a pivot support portion 10a. The means 18 can be turned up and down by expansion and contraction. The water cannon rotating section 14 is rotatably attached to the water cannon main body 20, and is rotated by the turning hydraulic motor 22. The nozzle (not shown) attached to the nozzle attachment portion 10 by this configuration moves the monitoring area in the lateral direction, that is, the turning direction, by turning the water discharge gun turning portion 14 with respect to the water discharge gun body 20 by the turning hydraulic motor 22. In addition, the elevating telescopic means 18 is extended and retracted by a hydraulic motor 19 for elevating (not visible in FIG. 2 because it is located behind the elongating means 18 for elevating), so that it is possible to elevate vertically.

Further, in the water discharge gun, that is, the monitor nozzle shown in FIG. 2, a turning encoder 30 for detecting the rotation angle of the water discharge gun turning section 14 by the turning hydraulic motor 22, that is, the rotation angle of the nozzle in the turning direction, is provided. The nozzle mounting part 10 is attached and is
The elevation encoder 72 for detecting the vertical rotation angle, that is, the elevation angle, is mounted.

FIG. 3 shows the monitor nozzles G1 to G4.
The hydraulic system for urging the turning hydraulic motor 22 for rotating the water discharge gun rotating unit 14 and the elevating hydraulic motor 19 for expanding and contracting the elevating expansion / contraction means 18 in each of FIGS. The turning hydraulic motor 22 and the raising hydraulic motor 19 in each monitor nozzle switch the electromagnetic switching valves EV _A and EV _B , respectively, so that hydraulic pressure is supplied from the hydraulic pump OP via the flow control valve FV. Driven. Two flow control valves FV are provided for each hydraulic motor, one each for the right and left pipes leading to each hydraulic motor, and each flow control valve FV includes one check valve and one throttle valve. I have. In the case of each turning hydraulic motor 22, the two throttle valves in the two flow control valves FV have different throttle opening degrees.

This will be described in more detail with respect to the monitor nozzles G1 and G3. First, the monitor nozzle G1 will be described. The flow control FV11 on the left pipe to the turning hydraulic motor 22 includes a check valve C11 and a throttle valve T11, and the flow control valve FV12 on the right pipe is It includes a check valve C12 and a throttle valve T12. The throttle valve T11 has a large opening, and the throttle valve T12 has a small opening. As a result, when the electromagnetic switching valve EV _A is moved to the right and the hydraulic flow flows through the turning hydraulic motor 22 of the monitor nozzle G1 in the forward direction from left to right, the hydraulic flow from the hydraulic pump OP is opened. Hydraulic motor 2 for turning through throttle valve T11
2 so that the turning hydraulic motor 22 is turned on as shown in FIG.
, Turns right from left to right, and the hydraulic flow exiting the turning hydraulic motor 22 returns to the oil tank OT through the check valve C12. Accordingly, since a relatively large amount of hydraulic flow flows through the turning hydraulic motor 22 due to the throttle valve T11 having a large opening, the driving speed of the turning hydraulic motor 22 is relatively high.

When the electromagnetic switching valve EV _A is moved to the left and the hydraulic flow flows in the reverse direction, the hydraulic flow from the hydraulic pump OP now passes through the throttle valve T12 having a small opening to turn the hydraulic motor for rotation. 1 and the turning hydraulic motor 22 turns left from right to left in FIG.
The hydraulic flow exiting the turning hydraulic motor 22 returns to the oil tank OT through the check valve C11. Therefore, the hydraulic flow through the turning hydraulic motor 22 is restricted by the throttle valve T12 having a small opening, and the driving speed is relatively low.

As described above, when the electromagnetic switching valve EV _A is moved to the right, the driving speed of the turning hydraulic motor 22 of the monitor nozzle G1 is high, and therefore, the monitor nozzle G1 moves the fire extinguisher close to the monitor nozzle G1. , i.e. while spraying on the inner circular region from the center to the dotted line in FIG. 1, pivoted to the right direction from the left to the right, also, if the electromagnetic switching valve EV _a is moved to the left, the monitor The driving speed of the turning hydraulic motor 22 of the nozzle G1 is low, and therefore, the monitor nozzle G1 sprays the fire extinguisher from a distance, that is, from the right to the left while spraying the fire extinguisher over the outer circle area from the dotted line to the solid line in FIG. It turns left.

Similarly, the monitor nozzle G3 also has a flow control valve FV3 on the left pipe to the hydraulic motor 22 for turning.
1 includes a check valve C31 and a throttle valve T31,
The flow control valve FV32 on the right pipe includes a check valve C32 and a throttle valve T32. The opening of the throttle valve T31 is made small, contrary to the case of the monitor nozzle G1, and the opening of the throttle valve T32 is made large.

Accordingly, when the electromagnetic switching valve EV _A is moved rightward and the hydraulic flow flows through the turning hydraulic motor 22 of the monitor nozzle G3 in the forward direction from left to right, the throttle valve T31 having a small opening degree is used. because the driving speed of the swing hydraulic motor 22 is relatively small, on the contrary, the electromagnetic switching valve if the EV _a flows moved hydraulic flow is reverse to the left, the drive for greater throttle valve T32 opening rate is relatively large, therefore, when the electromagnetic switching valve EV _a is moved to the right, since the monitor nozzle G3 is turned slow, the monitor nozzle G3 fire extinguishing agent in the distance, i.e. from the dotted line in FIG. 1 while sparging the outer circle area to the solid line, and turning to the right direction from the left to the right, also, if the electromagnetic switching valve EV _a is moved to the left, the monitor nozzle G3 turns faster So the monitor nozzle G Near the fire extinguishing agent, namely 1
While spraying on the inner circle area from the center to the dotted line in
It turns counterclockwise from right to left.

In the above description, the monitor nozzles G1 and G
3, only the action of the flow control valves FV41 and FV42 of the monitor nozzle G4 and the opening degrees of the throttle valves T41 and T42 are the same as in the case of the monitor nozzle G1, and the flow control FV21 of the monitor nozzle G2. Of the FV22 and the FV22, and the throttle valve T
The opening degrees of 21 and T22 are assumed to be the same as in the case of the monitor nozzle G3, and the turning direction and the spray area are as shown in the table below.

[0023]

[Table 2]

The hydraulic system shown in FIG. 3 swings each water discharge cannon, that is, the monitor nozzle, while receiving the signal from the above-mentioned turning encoder 30, and based on the signal from each encoder, limits the turning. When things are judged to reach the hydraulic pump O by switching control of the electromagnetic selector valve EV _a
By reversing the hydraulic flow from P, the monitor nozzle is swung in the opposite direction, and in this way, it is possible to spray the fire extinguisher on the inner circle area and the outer circle area as shown in FIG. 1 at each reversal. is there.

Hereinafter, the operation of the present embodiment will be described with reference to the flowcharts shown in FIGS.
In the following description of the operation, for simplicity of description, it is assumed that the water discharge cannon, that is, the monitor nozzle, rotates only in the turning direction and does not perform the elevating operation. In this case, the turning hydraulic motor 22 is used as a turning mechanism for turning the monitor nozzle in the turning direction, and the flow control valve FV for the turning hydraulic motor changes the turning speed of the monitor nozzle. Is used as a turning speed changing means.

When a fire occurs and a signal of a fire area or a signal from an emergency switch is input from the fire receiver to the control panel (YES in step 102), a control circuit having, for example, a microcomputer of the control panel (see FIG. (Not shown)
The determination of the fire area, that is, the fire area in which fire occurred (steps 104 and 106).

The case where it is determined that a fire has occurred in the first area Z (YES in step 104) will be described below. Since the same operation is performed in other fire areas, step 106 in the flowchart of FIG. In this figure, the operation of the fire extinguishing process in other fire areas is omitted.

When it is determined that a fire has occurred in the first area, that is, in the first fire extinguishing section Z, the control circuit then controls the hydraulic system to control the monitor nozzles G1 to G4 installed in the first area Z. four electromagnetic switching valve EV _a for swing hydraulic motor 22 initially all in the switching control on the right in, giving hydraulic flow in a forward direction from the hydraulic pump OP against swing hydraulic motor 22, thus Then, the monitor nozzles G1 to G4 installed in the first area Z are turned clockwise (step 108), and at the same time, the fire extinguishing agent is sprayed from the monitor nozzles G1 to G4 which have started turning (step 110).

Thus, the monitor nozzles G1 and G4
Are fired by hydraulic flows flowing through large openings of the throttle valves T11 and T41, respectively, so that their turning speeds are high. Therefore, fire is extinguished in the inner circle area from the center of each semicircle to the dotted line in the first area Z shown in FIG. The spraying agent is sprayed, and in the monitor nozzles G2 and G3, their turning speeds are slow due to the hydraulic flow restricted by the small opening of the throttle valves T21 and T31, respectively. Therefore, in the first zone Z shown in FIG. The fire extinguishing agent is sprayed on the outer circle region from the dotted line to the solid line of each semicircle, and this is shown by the shaded lines in FIGS. 6A, 6B and 6C. 6A shows the area sprayed when each of the monitor nozzles G1 to G4 turns to half of the turning range, FIG. 6B shows the area sprayed when each of the monitor nozzles G1 and G4 turns in the subsequent half, and C shows the turning area for one turn. The area sprayed when turning over is shown.

While the monitor nozzles G1 to G4 continue turning, a control circuit (not shown) reads a signal indicating the turning angle from the turning encoder 30 of each monitor nozzle (step 112), and each monitor nozzle receives the signal. It monitors whether the turning range limit has been reached. In the control circuit, the right-turn limit and the left-turn limit are set and stored in advance so that each monitor nozzle sprays the fan-shaped region of the inner circle region or the outer circle region illustrated in FIGS. 1 and 6. I have. In such a setting storage method, a memory for storing these limits may be incorporated in the control circuit, or a setting means that can be manually set such as a dip switch may be used.

The control circuit constantly compares, for each monitor nozzle, the signal from the turning encoder 30 with the corresponding limit previously set and stored.
If it is determined that the monitor nozzle that is turning right (turning left) has reached the limit of turning right (turning left) (step 11).
4 and 116, 120 and 122, 126 and 128,
And 132 and 134), to stop the right turn (left turn) for switching control of the electromagnetic switching valve EV _A hydraulic system so as to shift to the left turn (right turn).

When the switching control is performed in this manner, in the case of the monitor nozzles G1 and G4, the hydraulic flow of the turning hydraulic motor 22 is in the reverse direction, and the monitor nozzles G1 and G42 have small opening degrees of the throttle valves T12 and T42, respectively. The turning speed of G4 decreases, and in the case of the monitor nozzles G2 and G3, the turning speed increases due to the large opening degree of the throttle valves T22 and T32 through which the hydraulic flows of the turning hydraulic motor 22 flow in opposite directions. Thereby, contrary to the case of FIG.
As shown by the shaded lines of A, B and C, in the first area or fire extinguishing section Z, the monitor nozzles G2 and G3 are:
The fire extinguishing agent is sprayed on the inner circle area from the center of each semicircle to the dotted line, and the monitor nozzles G1 and G4 are arranged in the fire extinguishing section Z on the outer circle area from the dotted line to the solid line of each semicircle. Spray. As in the case of FIG. 6, A in FIG. 7 shows a region sprayed when each monitor nozzle G1 to G4 turns to half of the turning range, and B shows a region sprayed when each monitor nozzle G1 to G2 turns in the subsequent half. , And C indicate the areas to be sprayed when turning over one turning range.

Thus, each of the monitor nozzles G1 to G
No. 4, the inner circle area and the outer circle area are alternately switched while continuing to spray while reciprocating in a semicircular area with respect to the fire extinguishing section Z until the fire extinguishing is completed (step 138). If it is determined that the fire extinguishing has been completed (step 13
8), a turning stop command (step 140) and a discharge stopping command (step 142) are issued to the monitor nozzles G1 to G4, and the first standby state is set.

[0034]

As described above, according to the present invention, during the turning of the monitor nozzle by the turning mechanism, the turning speed of the monitor nozzle is changed by the turning speed changing means interlocked with the turning mechanism to increase the reach of the fire extinguishing agent. Since the fire extinguishing agent is changed, the fire extinguishing agent can be sprayed in a band-like area far from the monitor nozzle when the turning speed is low, and the fire extinguishing agent can be sprayed near the monitor nozzle when the turning speed is high. By
There is an effect that the fire extinguishing agent can be spread evenly over a wide fan-shaped or circular fire extinguishing section centered on the monitor nozzle.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a fire extinguishing section in a large space to which the present invention is applied.

FIG. 2 is a front view showing an example of a monitor nozzle that can be used in the present invention.

FIG. 3 is a system diagram showing a hydraulic system that performs turning control and elevation control of a monitor nozzle.

FIG. 4 is a flowchart illustrating the operation of the present invention.

FIG. 5 is a flowchart illustrating the operation of the present invention.

FIG. 6 is a view showing a mode of being sprayed to a fire extinguishing section by the operations shown in FIGS. 4 and 5;

FIG. 7 is a view showing a mode of being sprayed to a fire extinguishing section by the operations shown in FIGS. 4 and 5;

[Explanation of symbols]

Z extinguishing compartments G1~G4 monitor nozzles 14 water cannons rotating portion 20 water cannon body 22 swing hydraulic motor (turning mechanism) 30 for turning the encoder EV, EV _A and EV _B electromagnetic switching valve FV, FV11, FV12~FV41, FV42 Flow control valve OP Hydraulic pump C11, C12 to C41, C42 Check valve T11, T12 to T41, T42 Throttle valve

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-117772 (JP, A) JP-A-2-177971 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A62C 37/00 A62C 31/03 A62C 35/68

Claims (3)

(57) [Claims] 1. A fire extinguisher which sprays a fire extinguishing agent on a fire extinguishing section by reciprocatingly or continuously turning a monitor nozzle by a revolving mechanism thereof. A fire extinguisher comprising a turning speed changing means for changing a speed. 2. The fire extinguisher according to claim 1, wherein the turning speed changing means is means for controlling electric power applied to the electric motor when the turning mechanism is an electric motor. 3. The fire extinguisher according to claim 1, wherein the turning speed changing means is a means for controlling a flow of a hydraulic flow applied to the hydraulic motor when the turning mechanism is a hydraulic motor.